Sentry's transition from OAuth to GitHub Apps enhanced its integration with GitHub by simplifying the signup process, improving security, and offering a better user experience. This shift allowed Sentry to provide organization-wide installations, ensuring that integrations remain intact despite staff changes, and enabled more granular control over repository permissions, addressing a previous gap in security. The upgrade, built from scratch rather than modifying the old OAuth integration, aligned well with Sentry's organizational structure, streamlining the authentication and integration processes into a single channel through GitHub Apps. This consolidation not only made the application cleaner and reduced maintenance time but also improved the overall developer experience by integrating error monitoring and identity management more seamlessly. The successful implementation underscores the value of GitHub Apps in enhancing Sentry's functionality and reliability for developers leveraging both platforms.